Balanced throttle and trip valve



F. HENNEBO HLE BALANCED THRQTTLE AND TRIP VALVE Feb. 28, 1933.

Filed May 18, 1931 2 Sheets-Sheet l .elo'singitheinain and pilotvalvest F Pate ted F B. 2s, r1933 I i Imus:

orLoniAGm ILLINOIS I i Q AWC QT OT WF ih Y J1 r ap uegaon nieg' ma s,

I My invention relates to'valve'mechanisms; for controlling the, flow'of fluids' u nder pres-1 sure, and it particularly has 'for'its object toi p p threaded aperture the latterreceiving the stuflingiboxll whichhas aglandlQ held'by 5 stulfingjnut and hasprovisions for the p v passage of the valve stem, 14.: -The valve stem "14 is continued downwardly and .fcarries up; 7

provide: an improved construction of throttle 5 valvewhich can be operated with but little effort even though the valve be designed to 1 Passla large lme of fluid. I a

Further, it is an object 'tov provi for use as anlfengine throttle va1ve,'whieh 1- may be associated (with ana'over-speed gOV-f ernor'soas to eifect-a-complete shut-01f of the valve should a predetermined excessive speed be reached; r i

Further; it is an obj ect-to provide a thr etle'valve having a main valve for closin ofii thefluid passagefthroughthe valve an an associated pilot] valve to effect aibalanced' pressure oneachen'd of'the main valve prior to its beingengaged'for the purpose ofmov-g "ing it off its-seat,thereby to reduce the efl'ort required it Q unseat the mainjvalve t a mum. w

Other objectsnwill in part be'obvious' and inpa-rt bepointed outhereinafter.

To thegattainment of the aforesaid objects and endsg the invention" still further resides in the noveldetailsj of construction, co'mbination and arrangement :of parts, Tall of I which will be-firstfully described in the fol-fjlowing detailed description; then be pantie-" ularly pointed out in the "appended claims, reference being had to the accompanying drawings, inwhichz- Figure 1 is a vertical longitudinalsection' of my invention applied to a throttle 'valve operated through 1 a lever for opening and I Figure 2 is a plan of the same; i Q 1 1 Figure?) is an-elev'ationyof atrip-throttle valve einbodying the invention. e

Figureja is a vert'cal 4+4 of Figure 3.:

5+5 ofFigure 3. e p a I t I :In thefdrawings; ;1 ,represents'the valve" 7 body having the usual inlet 2 and; outlet'3 separatedby a weborpartition 4' wh'ichhasw. I

' pilot valves and prevent'the flow'fof fluid; At I a threaded opening fiiforthe reception of the 1 replaceable i e embodiment illustrated) valve seat bushing 6. The valve seat bush de avalve ectlon j the line Figure?) is a horizontal sectionon the line I tice as'follows. V 1 A, I v

{Assume the valve to be'connected in asuit-i ieaif sat n uddts ss'zs f ing hasthe usual valve seat face? The Z is also-bored at, 8 co-axiallylwith the bush 1ng 6 havlngja reduced bore portion9ian'd-a per andlower sets of wings- 15 and16 and seat27 at the entrance to the-passage through 5 the-barrel24 ofthe main valve.

he ain. valve consists of the valve head properf235 the-guidedisk piston 25, which are united; by the barrel 24C, and suitable.

gu'idewings 26, therebeing'lu'gsofi provided I on the end face of thejdisk piston% to pre-.' vent thecheck nut 28 closing the-bore of'the' barreLQ i. I.

1 .The-valve body 1 has an opening 19 in its bottom that is closed-by a suitable cover 20 secured by cap screws- 21 and provided with a so'c'keted boss22 constituting a guide forthee ,p'ilot' valve"18. v Y r '7 t I The checknut28is secured to'the stein 14 v by a cotter. pin29,or' in anyother suitable wat yk fl p 1 F30is' ajswivel split-clamp bracket held'in anypositio'n "around the axis of the valve 3 stem'l t on thel stufling box by means ofa cap; -Theupper offthe valve stem' l t is threaded as "at 32130 receive the' coupling head 33 whichis'made in the-fornrofasplit; 857' I threaded clamp held securely in placeby a c capscrew3i. v

36 isjan-operating lever pivoted 'at' 35 to thehead 33 and connected by a link 37m the bracket v30, the linkbeing plvloted to the 9' bracketandto the lever; g Thefo'regoing constitutes the; first e'mbodi- Inent ofmy invention which operates 'prac able pipe line, the fluid entering at? under 1 pressure nor allytends to seat the'main and this timefthe parts are positioned as showninilligurel: I 5 9 engaged lugs 56) causes the main-valve to be unseated and permits the fluid to flow from inlet 2 via opening in bushing 6 to outlet 3.

The weight of the main valve, ,which has a, limited floating movementon the stem, is sufiicient, after "the main valve has been opened, to cause itto gravitate to bringthe surface 27 onto the surface 17, thereby closing the passage through the barrel 24 which is controlled bythe pilot valve 18, When it is desired to close the valve the lever 36 is operated in the opposite direction and the valvelifted. The lifting movement effected by the lever 36 is, of course, augmented by,

I the force of the fluid in chamber against the valve head 23. 'Anyfluid' in the bore 8 at the outside of the piston 25 will be. forced back through the barrel 24 and escape be tween the surfaces 17 and 27, or leak past the guide disk piston 25, or if desired a bleeding port 57 may becplaced in the barrel as indicated in Figure 1. v c v The embodiment of the invention illustrated in Figures 3, 4 and 5 of the'drawingsis designed for a combined hand throttle and;

trip valve. In its essential features it does not differ greatly from the first embodiment of the invention as will be seen by reference to Figures 3, 4 and 5. 1

In those figures the parts merely in sizeor form, with similar parts in the preceding embodiment, bear the same letters of reference plus the index letter (a) The embodiment now under discussion differs from the preceding embod ment in that there is provided a larger opening in.

the top of the valve body 1 as at 38 and there is inserted a bushing 40 in which the disk piston 25a works, the bushing 40 being heldin place by the cover 41, that is heldto the body by cap screws 42, the body 1 having a seat 39 for the bushing 40. f j.

The cover carries a stuffing box or gland 43 and also supports a bridge 44 having vertical guides 45 and'horizontal stops 46 for the vertical travelling nut 47, which has grooved wings 48 to cooperate with the guides 45. 1

and, passing through the gland into the Valve body where it is provided witha swiveljoint' Further movement in V which are of; essentially the same construction, differing casing outsi connection 51 with the valve stem 14a. Thus, the auxiliary and main valves may be moved in either direction by turning the hand wheel 50, or by pushing up and down on the shaft 49, the turning movement being provided for purposes of adjustment of the magnitude of the unseating of the valve.

52iis a bearing on the bridge or yoke member 44 for the shaft 53 of the trip lever, the shaft carrying a trip latch 54 that engages the nut 47 to hold the valve in its opened position, therebein a lever 55 which is adapted to beconnected toan over-speed governor so that with the valve open should the speed of the engine'ex'ceed the maximumthe governor will. pull the lever .55, release the latch 54 and permit the valves to close due to the pressure of the fluid on the inlet side.

From the foregoing descriptiomtaken in connection with the accompanying drawing,

it is thought the complete, construction, operation and advantages of myinvention, will beclear to those skilled in the art to which it-relates. v

What I claim is: s r

1. A balanced throttle valve comprising acasing having an inlet endand an outlet end separated by a web which has a threaded passage, a valve seat bushing screwed into said webpassage and having a stop flange to engage said web, said casing having a piss ton chamber above the web on the outlet side of the valve, said chamber having a piston.

guide wallof lessdiameter than that of said bushing, a main valve having a head to engage the seat ofsaid bushing and having a arrel with guide wings extending through 7 an a utment on said stem within the'piston chamber, and protuberances on the piston to stop the abutment against closing off communication between said barrel and said piston chamber and means on said stem and de of the casing for actuating said stem for the purposesdescribed.

2, Abalanced throttle valve comprising a casing having an inlet end and an outlet end separatedby a web which has a threaded pasa valve seat bushing screwed into said sa e, I wgb passage and having a stop flange to engage said web, said casing having a piston chamber above the web on the outlet side v 7 a c i of the valve, said chamber having a piston. 49 is a screw shaft turned by a hand wheel c .50 and having bearing at 58 inthe bridge 44' ide wall of less diameter than that of said ushing,-a main'valve having a head toengage the seat of said bushing and having a barrel with guide wings extending through said bushing into said piston chamber and having a piston integrally formed with the barrel and Wings and located in said piston chamber, a valve stem having a portion passing through said barrel, said stemhavmg a valve portion and said main valve having a seat for said valve portion, the portion of said stem which lies; within the barrel having guide wings at each end ofthe barrel,

an abutment on said stemwithin' the piston, chamber, and protuberances on'the piston to a stop the abutment against closing off 'communication between said barrel and said piston chamber, and means on said stem and. easing outside of the casing for actuating said stem, said last named means comprising a screw and hand Wheel, afixed yoke having slideways, a cross bar slidable on said'slideways and having a nut "portion to engage said screw, said yoke havinga bearing, "a

shaft rockably mounted in said bearing and having a latch finger to engage said cross bar and having a lever by' which said latch .substantially as shown and described.

FRANK HENNEBOHLE. 

